fix: prevent PDF export crash on tables with nested quotes in inline styles

[Herafia]

Checklist before requesting a review

Please delete options that are not relevant.

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• It fixes !45825
• The PDF export would crash on tickets whose descriptions contained an html table with styles using url(‘...’) (nested quotes). The regular expressions in cleanTableHtml would break the html at these quotes, corrupting the table structure and causing tcpdf to lose track of the cells.

Fix: Replaced the regular expressions with DOMDocument/DOMXPath parsing in cleanTableHtml, which is robust against nested quotes.

[Rom1-B]

Can you add a unit test for cleanTableHtml() with a nested-quote url('...') style value (case from !45825)? Verified locally that the old regex code produced a <table> with duplicate border/style attributes on this input, the actual crash mechanism, and that the new code doesn't; a test would pin the regression.

[Rom1-B]

Please use pluginsGLPI/empty for example

Suggested change

	use function Safe\realpath;
	$current_plugin_folder = basename(realpath(__DIR__ . '/../'));
	$current_plugin_folder = basename(dirname(__DIR__));

[Rom1-B]

Suggested change

	<phpunit bootstrap="tests/bootstrap.php" colors="true" testdox="true">
	<testsuites>
	<testsuite name="Tests">
	<directory>tests</directory>
	</testsuite>
	</testsuites>
	</phpunit>
	<phpunit
	bootstrap="tests/bootstrap.php"
	colors="true"
	testdox="true"
	cacheDirectory="var/phpunit"
	>
	<source>
	<include>
	<directory>src</directory>
	</include>
	</source>
	<testsuites>
	<testsuite name="Tests">
	<directory suffix="Test.php">tests</directory>
	</testsuite>
	</testsuites>
	</phpunit>

And add var/ in .gitignore

[stonebuzz]

explode(';', ...) also splits inside url(...), so a data URI is rebuilt with an extra space and becomes invalid: url(data:image/png;base64,X) comes out as url(data:image/png; base64,X).

Suggested change

	foreach (explode(';', $style) as $declaration) {
	foreach (preg_split('/;(?![^(]*\))/', $style) as $declaration) {

[stonebuzz]

libxml_use_internal_errors(true) is never restored, so libxml error reporting stays silenced for the rest of the request.

Suggested change

	libxml_use_internal_errors(true);
	$libxml_previous_state = libxml_use_internal_errors(true);

and after libxml_clear_errors(); (line 481):

        libxml_use_internal_errors($libxml_previous_state);

[stonebuzz]

DOMXPath is rebuilt on every table; hoist it out of the loop.

Suggested change

	foreach (iterator_to_array($dom->getElementsByTagName('table')) as $table) {
	// Remove width/height (attributes and styles) on the table and its rows/cells
	$xpath = new DOMXPath($dom);
	$xpath = new DOMXPath($dom);
	foreach (iterator_to_array($dom->getElementsByTagName('table')) as $table) {
	// Remove width/height (attributes and styles) on the table and its rows/cells